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Composite powder, magnetic powder core for magnetic powder and preparation method thereof

A composite powder and magnetic powder core technology, which is applied in the direction of magnetic core/yoke, inductor/transformer/magnet manufacturing, magnetic materials, etc., can solve the problem that the required characteristics of magnetic powder core are not ideal

Inactive Publication Date: 2008-02-06
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The purpose of the present invention is to provide a composite powder for magnetic powder cores prepared by mixing two or more metal alloy powders to solve the problem that the performance of traditional metal magnetic powder cores is prepared using a single powder, and other required characteristics of the magnetic powder cores are not ideal. Magnetic powder core preparation method thereof, preparation of magnetic powder core powder and its magnetic powder core with comprehensive and comprehensive demand characteristics

Method used

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  • Composite powder, magnetic powder core for magnetic powder and preparation method thereof
  • Composite powder, magnetic powder core for magnetic powder and preparation method thereof
  • Composite powder, magnetic powder core for magnetic powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] This embodiment adopts water atomization method to prepare amorphous Fe 69 Ni 5 Al 4 sn 2 P 10 C 2 B 4 Si 4 Alloy powder and MPP powder. The pre-annealing process of MPP powder is 650℃×60 minutes;

[0107] Fe 69 Ni 5 Al 4 sn 2 P 10 C 2 B 4 Si 4 The pre-annealing process of the powder is 450°C×60 minutes, and the annealing process adopts a vacuum atmosphere. The negative 300-mesh powder was obtained by sieving respectively, and mixed to prepare composite powder. The mixing ratio is shown in Table 1.

[0108] Table 1

[0109] serial number

The mixing ratio

DC Bias Characteristics

Amorphous

powder

MPP

powder

Specific permeability

(500e)

Raise the ratio

(500e)

Specific permeability

(1000e)

Raise the ratio

(1000e)

1

25％

75％

63.9％

14.1％

37.0％

36.5％

2

50％

50％

85.4％

52.5％

70.4％

159.8％

...

Embodiment 2

[0113] This embodiment adopts water atomization method to prepare amorphous Fe 69 Ni 5 Al 4 sn 2 P 10 C 2 B 4 Si 4 alloy powder. Nanocrystalline Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 The preparation method of the alloy powder includes: 1. preparing an amorphous alloy strip by a single-roller quick quenching method; 2. annealing isothermally at 550° C. for 30 minutes in a nitrogen atmosphere; 3. obtaining nanocrystalline powder by ball milling with a planetary ball mill. where Fe 69 Ni 5 Al 4 sn 2 P 10 C 2 B 4 Si 4 The pre-annealing process of the powder is 450°C×60 minutes, and the annealing process adopts a vacuum atmosphere; the annealing process of the nanocrystalline powder is 550°C×30 minutes, and the annealing atmosphere is a nitrogen atmosphere. Sieve negative 400 mesh amorphous Fe 69 Ni 5 Al 4 sn 2 P 10 C 2 B 4 Si 4 and minus 100 mesh to plus 200 mesh nanocrystalline powder, and mixed to prepare composite powder, the mixing ratio is shown in Table 2...

Embodiment 3

[0119] This embodiment adopts water atomization method to prepare amorphous Fe 69 Ni 5 Al 4 sn 2 P 10 C 2 B 4 Si 4 Alloy powder, the sendust powder is prepared by crushing method. where Fe 69 Ni 5 Al 4 sn 2 P 10 C 2 B 4 Si 4 The pre-annealing process of the powder is 450°C×60 minutes, and the annealing process adopts a vacuum atmosphere; the annealing process of the sendust powder is 600°C×30 minutes, and the annealing atmosphere is a hydrogen atmosphere. Sieve negative 400 mesh amorphous Fe 69 Ni 5 Al 4 sn2 P 10 C 2 B 4 Si 4 powder and sendust powder, and mixed to prepare composite powder, the mixing ratio is shown in Table 3. The preparation method of the composite magnetic powder core is the same as that of Example 2.

[0120] The quality factor of the composite magnetic powder core and the quality factor of the comparative sendust powder core are shown in Figure 3. It can be seen that the addition of amorphous powder can significantly improve the qua...

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Abstract

The present invention provides a magnetic powder core, composite powder used for the magnetic powder core, and a production method for the both. The composite powder is blended and formed by powder A and powder B, the content of which comprises 50-96wt percent of the powder A and 4-50wt percent of the powder B; wherein, the powder A is one out of iron powder, Fe-Si powder, Fe-Si-Al powder, Fe-based nanometer crystal powder, Fe-base amorphous powder, Fe-Ni powder and Fe-Ni-Mo powder; the powder B has different demand characteristics compared with the powder A and is selected from at least one out of iron powder, Fe-Si powder, Fe-Si-Al powder, Fe-based nanometer crystal powder, Fe-based amorphous powder, Fe-Ni powder and Fe-Ni-Mo powder. The powder B can be Fe-based soft magnetic amorphous powder as the insulating agent, which can reduce the wastage of magnetic powder core and make up for the declining magnetic conductivity of magnetic powder core caused by the traditional insulating agent. The excellent of soft magnetic properties of the insulating agent is utilized to improve frequency features of the magnetic powder core.

Description

technical field [0001] The invention belongs to the field of functional materials and relates to a composite powder for magnetic powder cores and a preparation method for the magnetic powder cores. Background technique [0002] As the existing technology, the current types of metal magnetic powder cores mainly include iron powder cores, iron silicon powder cores, Sendust powder cores, Hi-Flux powder cores, MPP powder cores, and amorphous magnetic powder cores and nanocrystalline magnetic powder cores developed in recent years. These magnetic powder cores have their own characteristics, and their application fields are also different. [0003] As prior art documents related to the application of the present invention include: [0004] Patent Document 1: Chinese Invention Patent CN1373481A [0005] Patent Document 2: Chinese Invention Patent CN1487536A [0006] Patent Document 3: US Invention Patent US6,827,557 [0007] Patent Document 4: US Patent of Invention US6,594,157...

Claims

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Application Information

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IPC IPC(8): H01F3/08H01F1/06H01F1/047H01F1/09H01F1/147H01F1/20H01F41/02B22F1/00C21D1/26
CPCH01F1/15333
Inventor 卢志超李德仁周少雄陆曹卫郭峰李健靓王俊赵同春张亮
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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